A dirty commercial kitchen hood isn't just unsightly — it's a documented fire hazard and a health code violation. Kitchen fires account for over 60% of all restaurant fires in North America, and grease buildup in exhaust systems is the leading cause. Choosing the right kitchen hood degreaser and following a disciplined cleaning schedule is one of the highest-leverage investments a commercial kitchen operator can make.
This guide covers everything facilities managers and kitchen operators need to know: deposit types, degreaser selection criteria, application technique, NFPA 96 compliance schedules, and cost-per-use analysis. All product recommendations are Made in Canada, plant-derived, and available in bulk concentrates for multi-unit facilities.
Shop Industrial Degreaser No.71 — $26.95Why Kitchen Hood Grease Is a Real Hazard
Commercial kitchen exhaust systems accumulate grease from cooking vapours, steam, and airborne particulates. This grease condenses on hood surfaces, filters, and ductwork — and it is highly flammable. The National Fire Protection Association (NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations) sets minimum cleaning frequencies because insufficient cleaning is the direct cause of most commercial kitchen fires.
Beyond fire risk, grease-laden exhaust systems generate non-compliance citations from health inspectors. In most Canadian jurisdictions, commercial kitchens are required to maintain grease cleaning logs and submit them during inspections. A missed cleaning cycle or incomplete documentation can result in fines, license suspension, or forced closure.
The practical upside: proper degreaser chemistry makes the job fast. A concentrated alkaline degreaser emulsifies grease on contact, cutting cleaning time from hours of scrubbing to 20–30 minutes per cycle when applied correctly and on schedule.
Understanding Grease Deposits: Light vs. Carbonized
Not all grease buildup is the same. Cooking volume, cooking type, and cleaning frequency determine what you are dealing with — and that determines which degreaser concentration to use.
Light Grease (Soft, Yellow/Tan Deposits)
Typical of low-volume kitchens or facilities cleaned on schedule. Fresh grease is soft and emulsifies quickly — a diluted degreaser at standard concentration removes it in one pass. If your hood consistently looks like this, your cleaning schedule is working.
Moderate Grease (Dark Brown, Thickened)
Grease that has undergone partial oxidation — typically three to six weeks of buildup in a moderate-volume kitchen. Requires a medium-duty degreaser with dwell time. Most full-service restaurants operating on quarterly cleaning cycles fall into this category.
Heavy / Carbonized Grease (Black, Hard, Baked-On)
The result of neglected hoods or high-heat cooking environments — wok stations, open-flame grills, wood-fired ovens. Carbonized deposits have cross-linked polymers that ordinary degreasers cannot penetrate without extended dwell time or mechanical agitation. Heavy-duty concentrate at increased application strength is required. In severe cases, two cleaning passes are needed.
Inspect the hood surface and classify the deposit type before selecting your degreaser. This single step determines both dilution ratio and dwell time — getting it wrong means either wasted product or an inadequate clean.
What to Look for in a Kitchen Hood Degreaser
Commercial kitchen environments require degreasers that meet specific criteria beyond simply cutting grease. Here is what to evaluate before committing to a product.
Alkalinity (pH)
Grease and oil are acidic organic compounds — alkaline chemistry neutralizes and emulsifies them. Effective kitchen hood degreasers are typically pH 11–13 (strongly alkaline). Higher pH means faster grease breakdown, but also requires proper PPE (nitrile gloves, eye protection) during application. For heavily carbonized deposits, a high-pH concentrate is non-negotiable.
Concentrate vs. Ready-to-Use
For facility operations cleaning multiple hoods or multiple locations, concentrate is the only economically viable format. Buying ready-to-use (RTU) spray bottles for commercial hood cleaning costs 8–15 times more per litre of working solution than diluting concentrate on-site. A 4L concentrate yields 20–60L of working solution depending on dilution — enough for dozens of cleaning cycles from a single container.
Plant-Derived Formula
Even though hoods are above food prep areas, aerosol and runoff contact with food contact surfaces is possible. A plant-derived, biodegradable formula reduces contamination risk and simplifies compliance documentation. Petroleum-based solvent degreasers require WHMIS-designated storage and disposal — adding cost, liability, and handling complexity in active kitchen environments.
Biodegradable / Drain-Safe
Kitchen hood cleaning generates significant wastewater with emulsified grease. A biodegradable formulation reduces drain loading and is compliant with most Canadian municipal wastewater standards. This matters operationally — facilities that dispose of petroleum-solvent waste improperly face environmental liability; those using biodegradable products do not.
Janitori No.71 vs. No.72 MAX: Which One?
JANITORI™ manufactures two industrial degreasers from its Canadian facility (EST. 1994), both plant-derived and biodegradable. Here is how to choose for kitchen hood applications specifically.
| Feature | Degreaser No.71 | Degreaser MAX No.72 |
|---|---|---|
| Best for | Regular cleaning cycles, moderate grease | Heavy buildup, carbonized deposits, deferred cleaning |
| Grease severity | Light to moderate | Moderate to heavy / carbonized |
| Price (4L) | $26.95 | $29.95 |
| Price (20L) | — | $124.95 |
| Dwell time | 2–5 minutes standard | 5–10 minutes for heavy deposits |
| Formula | Plant-derived concentrate | Plant-derived MAX concentrate |
| Origin | Made in Canada since 1994 | Made in Canada since 1994 |
Rule of thumb: If your hood cleaning is on schedule — monthly or quarterly — No.71 handles regular maintenance. If you are dealing with buildup from a deferred cleaning, a newly acquired facility, or a high-volume wok kitchen, start with No.72 MAX for the first cycle, then switch to No.71 for ongoing maintenance.
For multi-location operations, the 20L drum of Degreaser MAX No.72 at $124.95 significantly reduces per-litre cost and eliminates frequent reordering. Decant into labelled spray bottles at point of use.
Shop Degreaser MAX No.72 — From $29.95Step-by-Step Hood Cleaning Process
Proper application technique matters as much as product selection. This is the professional process used by commercial cleaning contractors across Canadian facilities.
- Shut down cooking equipment and allow all surfaces to cool to room temperature. Never apply degreaser to hot metal — heat vaporizes the active chemistry before it has time to work and increases VOC exposure for the operator.
- Lay down floor protection. Plastic sheeting under the hood catches drips during cleaning. Tape off food contact surfaces below the hood as an added precaution.
- Remove and soak grease filters. Pull baffle filters and submerge in a bucket of warm degreaser solution for 15–20 minutes. This handles filter cleaning while you work on the canopy — parallel workflow cuts total cleaning time significantly.
- Apply degreaser to hood interior. Using a spray bottle loaded with working solution, apply from bottom to top (gravity pulls solution down, increasing contact time on lower surfaces). For carbonized deposits, apply liberally and allow the full dwell time before agitating.
- Agitate with a stiff-bristle brush. Work in sections along the grain of the metal. For baffled hoods, work around baffle slots. Use a brush designated exclusively for hood cleaning — cross-contamination from floor or drain brushes introduces bacteria into a food service environment.
- Wipe and rinse. Remove emulsified grease with clean rags or paper towels, then rinse all surfaces with water to remove degreaser residue. Verify no residue remains in any area where drip contact with food is possible.
- Reinstall clean filters. Rinse soaking solution through the filters, wipe dry, and reinstall. Inspect for bent or damaged baffles — compromised baffle geometry reduces airflow efficiency and grease capture rate.
- Document the cleaning. Log the date, degreaser product used, concentration, and operator name. This log is required for health inspections and fire marshal audits in most Canadian jurisdictions. Keep it accessible on-site.
Recommended Cleaning Schedule (NFPA 96 Compliance)
NFPA 96 sets minimum cleaning intervals based on cooking volume and fuel type. Most Canadian provincial fire codes reference NFPA 96 as the applicable standard. Below is a practical compliance table for kitchen operators and facilities managers.
| Kitchen Type | Examples | NFPA 96 Minimum | Recommended Practice |
|---|---|---|---|
| High-volume / solid fuel | Fast food, pizza ovens, wok stations, charbroilers | Monthly | Monthly |
| Moderate-volume | Full-service restaurants, hospital cafeterias, hotel kitchens | Quarterly | Quarterly |
| Low-volume / steam-heavy | Church halls, boardroom kitchens, seniors' residences | Semi-annual | Semi-annual |
| Very low / seasonal | Summer camps, event venues, seasonal food operations | Annual | Before each operating season |
Note that these are minimums. High-performance or solid-fuel cooking equipment should be inspected visually between scheduled cleans. If baffle filters show heavy grease accumulation between cycles, move to a shorter interval — the NFPA table is based on average volumes, not peak-season commercial kitchens. Consult your local fire marshal's office to confirm jurisdiction-specific requirements.
Cost-Per-Cleaning Analysis
One of the strongest arguments for concentrate degreaser is economics. Here is the math for a standard full-service restaurant cleaning quarterly.
| Product Format | Unit Cost | Working Solution Yield | Cost / Litre RTU | Est. Cost / Hood Clean |
|---|---|---|---|---|
| Janitori No.71 (4L concentrate) | $26.95 | ~40L at standard dilution | $0.67 | $2.00–$4.00 |
| Janitori No.72 MAX (4L concentrate) | $29.95 | ~20L at heavy-duty dilution | $1.50 | $3.00–$6.00 |
| Janitori No.72 MAX (20L concentrate) | $124.95 | ~100L at heavy-duty dilution | $1.25 | $2.50–$5.00 |
| Typical RTU degreaser spray (1L) | $12–$18 | 1L | $12–$18 | $36–$72 |
Estimates based on 3–4L working solution per full hood cleaning cycle in a full-service restaurant. Larger exhaust systems require proportionally more product.
At quarterly cleaning (four cycles per year), switching from RTU spray bottles to Janitori No.71 concentrate saves $130–$270 per hood per year in product cost alone. For a three-hood commercial kitchen, that is $400–$800 in annual savings — plus reduced plastic waste and fewer delivery orders. Multi-location operators using the 20L drum of No.72 MAX see further per-litre savings and minimal reorder frequency.
For operators tracking total cost of compliance, add the cost of one degreaser concentrate to your annual cleaning log versus the cost of RTU alternatives purchased throughout the year. The delta funds your next equipment purchase.
Frequently Asked Questions
How often does a commercial kitchen hood need to be cleaned?
Minimum frequencies are defined by NFPA 96 and referenced in most Canadian provincial fire codes: monthly for high-volume cooking operations (fast food, wok kitchens, charbroilers), quarterly for moderate-volume restaurants, and semi-annually for low-volume or steam-heavy facilities. Your local fire marshal or health authority can confirm the applicable standard for your jurisdiction. When in doubt, err toward more frequent cleaning — there is no penalty for over-cleaning, but a missed cycle can result in fines or license action.
Do I need a food-safe degreaser for kitchen hood cleaning?
Hoods are positioned above food prep areas, and aerosol or runoff contact with food contact surfaces is possible. Using a plant-derived, biodegradable degreaser significantly reduces contamination risk and simplifies compliance documentation. Petroleum-solvent degreasers require WHMIS-designated storage and disposal, adding cost and liability. A plant-based concentrate is safer for your team, lower risk for incidental food contact surfaces, and environmentally compliant with municipal drain standards.
What concentration should I use for carbonized, baked-on grease?
For carbonized deposits, use a higher concentration (lower dilution ratio — more product per litre of water) and extend dwell time to 10–15 minutes before agitating. Degreaser MAX No.72 is formulated specifically for these applications. If deposits are extremely thick, a first pass to penetrate and remove the bulk, followed by a second pass at standard concentration, is more effective than a single heavy application. Always consult the SDS for the maximum recommended concentration for your specific application surface.
Can the same degreaser be used on other kitchen surfaces?
Janitori No.71 and No.72 MAX are formulated for hard, non-porous surfaces. They perform well on fryer exteriors, range tops, oven surfaces, stainless steel equipment, and tile backsplashes — not just hood canopies. Adjust dilution for the level of soil and always rinse food contact surfaces thoroughly after application. Consult the SDS for material compatibility questions, particularly for aluminium surfaces, which may require a lower-pH product to avoid oxidation.
What documentation is required for health inspection of kitchen hood cleaning?
Most Canadian jurisdictions require a grease cleaning log maintained on-site, documenting: date of each cleaning, the cleaning agent used, concentration applied, and the name of the person who performed the cleaning. Health inspectors typically request this log during routine inspections. In some provinces, third-party cleaning contractors are required for semi-annual deep cleans — check with your local health authority for jurisdiction-specific requirements. Regardless of who does the cleaning, JANITORI™ recommends maintaining a complete log for every cycle, including internal maintenance cleans.
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